In the Region & Language section of the System Settings, when choosing formats, a list of locales is displayed.

The entries of this list are similar to those in the system (e.g. /usr/share/i18n/supported in Debian) but not identical.

E.g. en_DK.UTF-8 is present in the system but absent from the Plasma locale list; en_SE.UTF-8 is present in the Plasma list, but absent from the system.

Why does Plasma use a separate list of locales?

Where is the Plasma locale list located in the file system?

Is it possible to add a locale absent in Plasma from the system to Plasma?

    • @formicantOP
      1•1 month ago

      fwiw here’s the en_SE locale source I use http://www.stacken.kth.se/~auno/en_SE as /usr/share/i18n/locales/en_SE so yes, you can add them

      This is adding a KDE layout into the system.

      Can I add a system layout into KDE?

      • Eager EagleEnglish
        1•1 month ago

        I don’t know what you mean by that. It’s a locale, it has nothing to do with KDE or Plasma. It doesn’t even need a desktop environment. Plasma Settings will just pick up the ones you have installed.

        • @formicantOP
          1•1 month ago

          I don’t know what you mean by that. It’s a locale, it has nothing to do with KDE or Plasma. It doesn’t even need a desktop environment. Plasma Settings will just pick up the ones you have installed.

          I used to think so too.

          However, Plasma apparently has its own list of locales not identical to the system one. (See the first post)

          • Eager EagleEnglish
            1•1 month ago

            I can see both en_DK and en_SE

            did you run locale-gen after adding it?